ACCESSORY KIT INSTALLATION INSTRUCTIONS

Transcription

1 ACCESSORY KIT INSTALLATION INSTRUCTIONS BLOWER OVERLOAD KIT MODELS 2MP , 2MP UAI-B-0112 For 20 Ton Generation 1 And 2 Split System Indoor Units WITH 7.5 HP Motor TABLE 1: BLOWER OVERLOAD RELAY KIT REFERENCE INFORMATION KIT NUMBER INDOOR UNIT MODEL VOLTAGE OVERLOAD RELAY NC/ND240C00F6***1,2 2MP NH/NJ-20C00FS***1,2 J20NC/NDC00F6***1,2 NC/ND240C00F6***1,2 208/ NH/NJ-20C00FS***1,2 J20NC/NDC00F6***1, NC/ND240C00F5***1,2 2MP NH/NJ-20C00FX***1,2 J20NC/NDC00F5***1, GENERAL The blower overload relay is required on all 7.5 hp motors. The relay protects against potential short-circuiting. Verify correct model number and number of parts. ITEM QTY. PART No. DESCRIPTION 1a Overload Relay (208/230V) Overload Relay (460V) 1b Overload Relay (575V) Overload Relay Bracket Label, Wiring For NC240, NH-20 or J20NC Units Label, Wiring For ND240, NJ-20 or J20ND Units Screw, PNH # Screw, PNH # Cable Strap Wire, Black # Wire, Yellow # Wire, Brown # Wire, Yellow # Wire, Yellow # Installation Instructions INSTALLATION GENERATION 1 : MODEL INSTRUCTION: 1. Disconnect power to the air handler unit. 2. Identify the model number on the unit nameplate. 3. Select a new wiring label: Unit Models NC240C00F(5/6)***1, NH-20C00F(S,X)***1 and J20NCC00F(5/6)***1 use Wiring Label G Unit Models ND240C00F(5/6)***1 NJ-20C00F(S,X)***1 and J20NDC00F(5/6)***1 use Wiring Label G Remove the control box access panel (See Figure 1). 5. Replace the wiring label on back of control box access panel with the new wiring label. 6. Determine the supply voltage to the unit. 7. Select the appropriate relay provided with the kit. Unit Models NC/ND240C00F6***1, NH/NJ-20C00FS***1 and J20NC/NDC00F6***1 use Overload Relay 7052 for 208/230V Operation. Unit Models NC/ND240C00F6***1, NH/NJ-20C00FS***1 and J20NC/NDC00F6***1 use Overload Relay 7050 for 460V Operation. Johnson Controls Unitary Products

2 Unit Models NC/ND240C00F5***1, NH/NJ-20C00FX***1 and J20NC/NDC00F5***1 use Overload Relay 2143 for 575V Operation. 8. Remove the blower access panel (See Figure 1). 9. A bracket must be installed to mount the overload relay (See Figure 3). 10. Refer to Gen. 1 control box Figure 3 for hole locations and dimensions. 11. Drill three, 7/32 holes in the locations shown. 12. Locate the overload relay bracket in the kit. 13. Position bracket behind control box as shown in Figure 3 and align holes in bracket with holes drilled in step Attach bracket to back of control box using 3 screws provided in kit. 17. Disconnect and discard wires 122, 123 and Retrieve wires 122, 123 and 124 from kit and route from M1 contactor, through bushing in bottom of control box, to BOR overload relay. Connect wires per new kit wiring diagram. Tighten connections to 20 in. lbs. 19. Disconnect and discard wire 208/yellow from M1 contactor terminal A and BR1 relay terminal Retrieve wire 208/yellow from kit and connect one end to terminal 95 on overload relay. Connect other end to terminal 5 on BR1 relay. 21. Retrieve wire 209/yellow from kit and connect one end to terminal 96 on overload relay. Connect other end to terminal A of M1 contactor 22. Verify that trip setting on overload relay is correct per table on wiring diagram. Adjust if required by rotating yellow dial to align appropriate amp value with arrow. 15. Attach appropriate Overload Relay to bracket using 2 screws provided in kit. NOTE: The Relay is factory set and does not require field modification. 16. Disconnect motor wires 101, 102, and 103 from M1 contactor, and reconnect to BOR overload relay as follows: 101 to terminal T1, 102 to terminal T2, and 103 to terminal T3 per the new wiring label. 23. Re-attach the control box and blower access panels. 24. Supply power to the air handler unit. 2 Johnson Controls Unitary Products

3 CONTROL ACCESS AND BLOWER MOTOR ACCESS FIGURE 1-20 TON INDOOR UNIT GEN. 1 Johnson Controls Unitary Products 3

4 MOTOR OVERLOAD RELAY KIT FIGURE 2 - MOTOR OVERLOAD RELAY LOCATION GEN. 1 4 Johnson Controls Unitary Products

5 TOP VIEW FRONT VIEW EXISTING CONTROL BOX 3X DRILL Ø EXISTING CONTACTOR BRI (EXISTING RELAY) SIDE WALL OF EXISTING CONTROL BOX BOTTOM WALL OF EXISTING CONTROL BOX MOUNTING BRACKET BOR NEW MOUNTING BRACKET POSITIONED BEHIND THE EXISTING CONTROL BOX CABLE TIE FOR WIRES FROM CONTACTOR TO OVERLOAD RELAY BOR (NEW BLOWER MOTOR OVERLOAD RELAY) CABLE TIE FOR WIRES FROM CONTACTOR TO OVERLOAD RELAY CABLE TIE FOR WIRES FROM BLOWER MOTOR TO OVERLOAD RELAY FIGURE 3 - MOUNTING LOCATION TEMPLATE GEN. 1 Johnson Controls Unitary Products 5

6 GENERATION 2 : MODEL INSTRUCTION: 1. Disconnect power to the air handler unit. 2. Identify the model number on the unit nameplate. 3. Select a new wiring label: Unit Models NC240C00F(5/6)***2, NH-20C00F(S,X)***2 and J20NCC00F(5/6)***2 use Wiring Label G Unit Models ND240C00F(5/6)***2, NJ-20C00F(S,X)***2 and J20NDC00F(5/6)***2 use Wiring Label G Remove the control box access panel (See Figure 4). 5. Replace the wiring label on back of control box access panel with the new wiring label. 6. Determine the supply voltage to the unit. 7. Select the appropriate relay provided with the kit. Unit Models NC/ND240C00F6***2, NH/NJ-20C00FS***2 and J20NC/NDC00F6***2 use Overload Relay 7052 for 208/230V Operation. Unit Models NC/ND240C00F6***2, NH/NJ-20C00FS***2 and J20NC/NDC00F6***2 use Overload Relay 7050 for 460V Operation. Unit Models NC/ND240C00F5***2, NH/NJ-20C00FX***2 and J20NC/NDC00F5***2 use Overload Relay 2143 for 575V Operation. 8. Remove the blower access panel (See Figure 4). 11. Place the template against the outside of the unit control box with the fold pushed against the front flange. 12. Align the hole for the motor wires with the hole shown on the template. 13. Drill two holes using a #29 drill bit in the locations shown. 14. Position the overload relay inside the control box as shown (See Figure 5). 15. Affix the relay using two pan head screws provided. 16. Disconnect motor wires 101, 102, and 103 from M1 contactor, and reconnect to BOR overload relay as follows: 101 to terminal T1, 102 to terminal T2, and 103 to terminal T3 per the new wiring label. 17. Disconnect and discard wires 122, 123 and Retrieve wires 122, 123 and 124 from kit and route from M1 contactor to BOR overload relay. Connect wires per new kit wiring diagram. Tighten connections to 20 in. lbs. 19. Disconnect and discard wire 208/yellow from M1 contactor terminal A and BR1 relay terminal Retrieve wire 208/yellow from kit and connect one end to terminal 95 on overload relay. Connect other end to terminal 5 on BR1 relay. 21. Retrieve wire 209/yellow from kit and connect one end to terminal 96 on overload relay. Connect other end to terminal A of M1 contactor. 22. Verify that trip setting on overload relay is correct per table on wiring diagram. Adjust if required by rotating yellow dial to align appropriate amp value with arrow. 9. Locate the drill hole template attached to these instructions. NOTE: The Relay is factory set and does not require field modification. 10. Fold the template along the dotted line. 23. Re-attach the control box and blower access panels. 24. Supply power to the air handler unit. 6 Johnson Controls Unitary Products

7 CONTROLS ACCESS BLOWER MOTOR ACCESS FIGURE 4-20 TON INDOOR UNIT GEN. 2 Johnson Controls Unitary Products 7

8 MOTOR OVERLOAD RELAY FIGURE 5 - MOTOR OVERLOAD RELAY LOCATION GEN. 2 8 Johnson Controls Unitary Products

9 1.000 REAR EDGE OF CONTROL BOX DRILL #29 (0.136 ) BOR FRONT FLANGE OF CONTROL BOX BEND TEMPLATE HERE DRILL #29 (0.136 ) FIGURE 6 - MOUNTING LOCATION TEMPLATE GEN. 2 Subject to change without notice. Printed in U.S.A UAI-B-0112 Copyright 2012 by Johnson Controls, Inc. All rights reserved. Supersedes: UAI-A-0411 Johnson Controls Unitary Products 5005 York Drive Norman, OK 73069